GCM How do I detect if app is open and if so pop up an alert box, instead of normal notification flow?

Question

I have an app where I want to build 2 different flow\'s in:

• 1.a App is open on any activity

• 1.b App show\'s an alertbox where user can choose to go to

Answer 1

In my code I have public static ArrayList activity_stack every activity is added in oncreate and removed in ondestroy methods. I check this stack in GcmBroadcastReceiver. I don't know if it's a good solution.